21170708003157 has 8 divisors (see below), whose sum is σ = 28690358387040. Its totient is φ = 13882431477360.

The previous prime is 21170708003149. The next prime is 21170708003161. The reversal of 21170708003157 is 75130080707112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21170708003157 - 2³ = 21170708003149 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21170708003957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57843464307 + ... + 57843464672.

It is an arithmetic number, because the mean of its divisors is an integer number (3586294798380).

Almost surely, 2^{21170708003157} is an apocalyptic number.

It is an amenable number.

21170708003157 is a deficient number, since it is larger than the sum of its proper divisors (7519650383883).

21170708003157 is a wasteful number, since it uses less digits than its factorization.

21170708003157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115686929043.

The product of its (nonzero) digits is 82320, while the sum is 42.

The spelling of 21170708003157 in words is "twenty-one trillion, one hundred seventy billion, seven hundred eight million, three thousand, one hundred fifty-seven".